Paint and varnish remover.



- 988: 4 gals. carbolic acid; 2 gals. woodalco- U TED STATES Hanna B. GHALMEBS, or SCHENECTADY, NEW Year r, ASSIGZNOR .ro LAWRENCE .'B.

DUNHAM, OF ELIZABETH N EW J No Drawing.

To a! Z :uilw'm, it may concern Be itf'known that LII-mar B. (n.a'nunns, a citizen-of'theUnited States, residing at Schenectady, in the county ofSchenectady and State of'New York, have invented certain-new and useful Improvements in Paint andVarnish'Removers, of whieh the followiug isa specification.

This invention relates to paint and varnish removers.

As early as-'1896, a remover having'the following formula was made and sold as appears from-depositions and a' stipulation of counsel in the printed record of a cause reported in vol. 146, Federal fieporter page hol; 2 gals. turpentine zole) ;'10 lbs. beeswax.

In the above remover the supposedfunct-ion of the carbolic acid is .todestroy'the paint or varnish layer by. chemical "disintegration, producinga new product ofa mixed character. This effect is said to be clearly observed in the interaction of carbolic-acid and the waxes or resins, whereby the-two substances after a very .short contact seem to get converted into .a magma, I entirely losing the identity on the one hand ofthe wax or resin or carbolicacid as such,'formingentirely a new body.

The above remover, while highly efiicient, is at many temperatures of about-the-consistency of lard, a-nd is, therefore, thicker 2 gals. benzene (benthan is frequently desired. Of course such a remover can be thinned by merely increas-' ing the volume of some one of the ingredients other than the thickening agent, that is, the wax; but to obtain such desirable thinning of the remover, while retaining the described and highly desirable, peculiar function of the carholic' acid as a destroyer of the paint or varnish layer by chemical disintegration, is far from obvious; but I have discovered as a result of experiments, that the desired thinner condition, coupled with retention of the desired action of the carbolic acid as a disintegrating agent of paint and varnish layers, can be 'accomplished as follows: I prepare two separate mixtures. The first is in accordance with the above formula, although as parafiin and ceresin waxes are cheaper than beeswax, in the present market and perhaps generally,

I prefer to substitute a mixture of paraflin and ceresin waxes in equal proportions for v Specification of Letters Patent;

Application fi1edMay22.

Patented July 1 ,1913. i912. Serial-*No.698,897

the beeswax specified inthe above formula. 'lhe other, or second mlxture, consists of lin having about the consistency of thin syrup -mixed with three parts of benzole (benzene). Of this second mixture'Iadd fifty gallons to the. old formulafirst above stated, so that the formula of my improved carbolic acid remover is as follows: etgals. carbolic acid; 2 gals. wood alcohol; 2 gals. turpentine; 2 gals. benzene (benzole) -10 lbs. of parafiin an'd-ceresin wax in equal parts; 20 gals. alcoholic solution of pyroxylin; 3O gals.*benzole (benzene).

Thecarbolic acid remover oft'he ol'dyforis of unstable consistency ethatlis, at the h gh temperatures of ordinary hot weather, it is about right to use, but at lower temperatures-it is of varying degrees ofhardness; and at very low temperatures .around or below' the: freezing point, is too. hard to use. The alcoholic solution .of pyroxylin n'rix'ed 'with-the-benzole, which is a good diluent,

by variation of'temperat'ure; and I have solution of pyroxylin in the proportions above-stated results in a carbolic acid re mover that is of-practically, uniform consistency at .a wide range ofo-temperatln'es, so .that itis-readily available for use in cold wveather,;as-.-well=as: in hot.

:Infthe primary mixture the benzole is th wax solvent and the alcohol serves to gelatinizethe wax partially, but not completely. The difficulty encountered in introducing the the carbolic acid remover of the primary mixture, is to prevent the wax 'and'pyro'xylin I find that this important result is eflected by making the secondary mixture or diluent in such proportions that it has a suificient percentage of wax solvent (benzole) to prevent the alcohol in'the diluent from further gelatini'zing'the partially gelatinized wax in the primary mixture, the benzole and alcohol in the secondary mixture or diluent, being so proportioned to each other and to the cor- ,responding elements of the primary mixture that when the two mixtures are mixed together, the partially gelatinized wax the primary mixture is not further gelatlnized or precipitated by the addition of the added mula, having a consistency of'that o'f lard,

does not substantially .vary in consistency.

from agglomerating into a-pasty mass, but

two parts of an alcoholic solution of pyroxy discovered that the addition of an alcoholic pyroxylin, which improves the consistency of I i alcohol, but, on the contrary, is further-dissolved by the added benzole, while there yet remains partially gelatinized wax in suspension through the whole volume of the mixture. My new product, although containing wax and pyroxylin, is characterized by the absence of a waste deposit or detritus in the form of a pasty mass.

While it has been long known, as shown by Smiths Patent No. 50,388 of June 14:, 1891, that alcohol is a gelatinizer of a wax solution, and while carbolic acid. removers that skimmed over and therefore retarded evaporation of the more volatile ingredients have been long made and sold, yetno one prior to this invention, so far as I am aware, has

made a carbolic-acid pyroxylin remover containing alcohol and benzole.

The proportions above stated may, of

course, be somewhat varied without departure fromthe invention, but I have set forth in detail those proportions which I have found to be the most highly eflicient and also those ingredients which, so far as I can ascertain, are the cheapest in the market,

What I claim, is:

1. As a new article of manufacture, a paint and varnish remover having a formula in substance as follows, 4 gallons carbolic acid; 2 gallons wood alcohol, or other suitable alcohol;-2 gallonsturpentine; 2 gallons benzole; 10 lbs. suitable wax; 20. gallons alcoholic solution of pyroxylin; gallons of benzole; and having when mixed together the wax in a state of partial gelatinization and in suspension through the remover and the pyroxylin in solution.

. 2.- As a new article of manufacture, a paint and varnish remo zer comprising a mixture of carbolic acid, alcohol, turpentine,

benzole, pyroxylin and Wax; the pyroxylin being in a dissolved state in the mixture and the wax being in a partially gelatinized state therein and substantially free from agglomeration with the pyroxylin.

8. The process of making paint and varnish removers, consisting in adding to and mixing with a mixture of carbolic. acid, alco- .hol, turpentine, benzole and wax in a stateof partial gelatinization, a diluent of the aforesaid mixture comprising pyroxylin, alcohol and benzole in volumes which when the two mixtures are intermixed will further partially dissolve the already gelatinized wax and maintain the pyroxyliu in solution without agglomeration with the wax.

4. The process of making paint and varnish removers consisting in mixing with a carbolic acid remover containing wax, a wax solvent and an alcoholic gelatinizer of the dissolved wax, a mixture containing pyroxylin, alcohol and wax solvent, all in proportions substantially as stated and thereby further dissolving the partially gelatinizedwax in the carbolic acid mixture and also preventing agglomeration of the wax and pyroxylin into a mass.

5. As a new article of manufacture, a paint and varnish remover comprising carbolic acid, a waxy body, a wax solvent and a gelatinizer of the dissolved wax, and an alcoholic solution of pyroxylin in proportions substantially as stated, the wax and pyroxylin being unagglomerated and the wax partially gelatinized and in suspension through the remover.

In testimony whereof I aflix my signature in presence of two witnesses.

' HARRY B. CHALMERS.

Witnesses:

EDWARD S. BEACH, EDWARD E. BLACK. 

